GM Service Manual Online
For 1990-2009 cars only

Special Tools

EN-47632 Cleaner

For equivalent regional tools, refer to Special Tools.

Caution: 

   • Use care when servicing the fuel system components, especially the fuel injector electrical connectors, the fuel injector tips, and the injector O-rings. Plug the inlet and the outlet ports of the fuel rail in order to prevent contamination.
   • Do not use compressed air to clean the fuel rail assembly as this may damage the fuel rail components.
   • Do not immerse the fuel rail assembly in a solvent bath in order to prevent damage to the fuel rail assembly.


    Object Number: 2027830  Size: SH
  1. Remove the hole plug bolts (1)
  2. Remove the hole plugs and the hole plug gaskets (2, 3).

  3. Object Number: 2027835  Size: SH
  4. Loosen and lift the injector bracket bolt (1).
  5. Shift the fuel injector bracket (2) and the bolt (1) with washer (3) back.

  6. Object Number: 2027848  Size: SH
  7. Remove the 4 fuel injectors (1).
  8. Remove the 4 fuel injector gaskets (2).

  9. Object Number: 2027849  Size: SH
  10. Use the EN-47632 cleaner to clean the injector seat.
  11. Loosen dirt with the brush side.
  12. Remove dirt with the sponge side.